(2016-03-03)

fix two bugs in 379 cartridge make code - one would not detect the size of carts that bumped right up against an 8k boundary, and the other wrote the wrong jump address to the startup code (file that under 'how did it ever work?').

add menu option to erase UberGROM contents (for testing)

add a hack for programs that require the 5th sprite number to count up during frames when 5S and F are reset (Miner2049er - may have been in previous release)